Income Taxes - Reconciliation of Provision for Income Taxes (Detail)	12 Months Ended
	Aug. 31, 2019	Aug. 25, 2018	Aug. 26, 2017
Federal tax at statutory U.S. income tax rate	21.00%	25.90%	35.00%
State income taxes, net	2.00%	1.90%	1.30%
Transition tax		1.60%
Share-based compensation	(1.80%)	(1.60%)	(1.40%)
Impact of tax reform	(0.40%)	(9.60%)
Other	(0.40%)	0.10%	(1.40%)
Effective tax rate	20.40%	18.30%	33.50%